The invention discloses a tool grinding machine grinding wheel convenient to disassemble and assemble. The grinding wheel comprises a conical outer jacket; an outer end cover is formed at the back endof the outer jacket; a conical annular grinding wheel is inserted in the outer jacket; a conical inner jacket is inserted in the annular grinding wheel; an inner end cover is formed at the back end of the inner jacket; a circular connecting sleeve is inserted at the position, on the back side of the inner end cover, in the outer jacket; multiple spoke rods are formed on the outer wall of the connecting sleeve; the outer ends of the spoke rods are fixed on the inner wall of the outer jacket; first thread rods are formed in the spoke rods; fastening bolts are inserted in the inner end cover ofthe inner jacket, and are screwed into the first thread holes of the spoke rods; the annular grinding wheel is clamped between the outer jacket and the inner jacket, and is exposed on the front end surfaces of the outer jacket and the inner jacket; a conical sleeve base is formed on the outer end cover of the outer jacket; and the front end of the sleeve base is fixedly inserted in the connectingsleeve. The grinding wheel is conveniently disassembled and mounted on a rotating main shaft of a tool grinding machine, and is conveniently replaced.